FPS loss on my Laptop

If you're on a laptop, have u checked for what power settings ur using? also what settings set on the gpu? as u updated maybe vsync and other settings got on and ur gpu can't handle it? try to check those things, you said something about freezings, is your laptop hot? do you clean it? change the Thermal Paste? being one year old, if u don't do that stuff and it is indeed getting hot, you may be damaging internals and may be a cause for your laptop problems